Applications of Surface Metrology to Issues in Art
... experiment to discern different brush hair types and different paint material by taking measurements using fine-scaled microscopes and analyzing the results using surface metrology software. As a result, we were able to discern different brush hair types from each other with 99.9% confidence level e ...
... experiment to discern different brush hair types and different paint material by taking measurements using fine-scaled microscopes and analyzing the results using surface metrology software. As a result, we were able to discern different brush hair types from each other with 99.9% confidence level e ...
Ammonia Optical Sensing by Microring Resonators
... where ncore is the core layer refractive index and some additive contributions at denominator can be neglected. Relationship (9) shows how sensitivity strongly depends on the index contrast between cladding and core layers. By decreasing this contrast, it is possible to improve the sensitivity, but ...
... where ncore is the core layer refractive index and some additive contributions at denominator can be neglected. Relationship (9) shows how sensitivity strongly depends on the index contrast between cladding and core layers. By decreasing this contrast, it is possible to improve the sensitivity, but ...
Optical Processing for Pattern Properties
... angular distributions and the properties of the lines (length, thickness) are the same. I n C and D are shown the wiener spectra corresponding to the distributions of A and B. The spectrum corresponding to A f C) is seen to be discontinuous, a series of sincz-functions, while the spectrum correspond ...
... angular distributions and the properties of the lines (length, thickness) are the same. I n C and D are shown the wiener spectra corresponding to the distributions of A and B. The spectrum corresponding to A f C) is seen to be discontinuous, a series of sincz-functions, while the spectrum correspond ...
Stereochemistry at Tetrahedral Centers
... hand. Your mirror image raises his or her left hand. • You can test whether two objects are identical by seeing if they are superimposable. • Chirality is important in molecules. – Because two chiral molecules are mirror images, they will have many identical properties, but because they are not iden ...
... hand. Your mirror image raises his or her left hand. • You can test whether two objects are identical by seeing if they are superimposable. • Chirality is important in molecules. – Because two chiral molecules are mirror images, they will have many identical properties, but because they are not iden ...
PT symmetry in optics
... constants in the language of optics) are ∓ sinh θ. Unlike Hermitian systems, these eigenmodes are no longer orthogonal. This leads to important implications for beam dynamics including a non-reciprocal response and power oscillations. For a conventional Hermitian system (γ = 0), any superposition of ...
... constants in the language of optics) are ∓ sinh θ. Unlike Hermitian systems, these eigenmodes are no longer orthogonal. This leads to important implications for beam dynamics including a non-reciprocal response and power oscillations. For a conventional Hermitian system (γ = 0), any superposition of ...
Paper
... For low dressing beam intensity, the probe beam gain is due to the two-photon gain of individual atoms (Fig. 1b). By introducing the dressed atom picture [3], the optical gain can be understood as the gain of a fully inverted two-level system (Fig. 1c). The atoms in the condensate and the photons in ...
... For low dressing beam intensity, the probe beam gain is due to the two-photon gain of individual atoms (Fig. 1b). By introducing the dressed atom picture [3], the optical gain can be understood as the gain of a fully inverted two-level system (Fig. 1c). The atoms in the condensate and the photons in ...
Variability in ultraviolet total optical depth during the Southern
... wavelengths (300, 306, 312, 318, 326, 333 and 368 nm) at two sites during the period 1 July to 1 November 1997. The "rst site was at Riverside (260 m a.s.l.) in the Los Angeles metropolitan area, which frequently experiences severe air pollution episodes. The second site was at Mt Wilson (1725 m a.s ...
... wavelengths (300, 306, 312, 318, 326, 333 and 368 nm) at two sites during the period 1 July to 1 November 1997. The "rst site was at Riverside (260 m a.s.l.) in the Los Angeles metropolitan area, which frequently experiences severe air pollution episodes. The second site was at Mt Wilson (1725 m a.s ...
Optical properties of the human tissue
... method is widely used in tissue optics for processing the experimental data of spectrophotometry with integrating spheres. This method allows one to determine the absorption and the reduced scattering coefficients of a turbid media from the measured values of the total transmittance and the diffuse ...
... method is widely used in tissue optics for processing the experimental data of spectrophotometry with integrating spheres. This method allows one to determine the absorption and the reduced scattering coefficients of a turbid media from the measured values of the total transmittance and the diffuse ...
All students are asked for bringing your own samples which
... The size of the spot formed by the beam on the sample surface sets a fundamental limit on resolution. An SEM cannot resolve features smaller than the spot size. In general, low beam current, short working distance and high accelerating voltage yield the smallest spot. Other factors such as type of s ...
... The size of the spot formed by the beam on the sample surface sets a fundamental limit on resolution. An SEM cannot resolve features smaller than the spot size. In general, low beam current, short working distance and high accelerating voltage yield the smallest spot. Other factors such as type of s ...
Observation of preferred instability modes in a mechanically
... not react to higher disturbance frequencies. This is in good agreement with earlier results obtained by other measurement techniques [4–6]. Fig. 3 shows a typical plume behavior for a source temperature of 150 8C and for z C /D=1.88 (see also Fig. 4 for a source temperature of 200 8C). Structures of ...
... not react to higher disturbance frequencies. This is in good agreement with earlier results obtained by other measurement techniques [4–6]. Fig. 3 shows a typical plume behavior for a source temperature of 150 8C and for z C /D=1.88 (see also Fig. 4 for a source temperature of 200 8C). Structures of ...
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... isolated from motor and table conducted vibrations. Adjacent to (but not touching) the end of the steel table removed from the motor, a low wooden table was placed on the concrete floor. An optical bench, supporting a light source, an iris and an achromatic collimating lens (f/1.9, focal length 5 in ...
... isolated from motor and table conducted vibrations. Adjacent to (but not touching) the end of the steel table removed from the motor, a low wooden table was placed on the concrete floor. An optical bench, supporting a light source, an iris and an achromatic collimating lens (f/1.9, focal length 5 in ...
High-accuracy wavefront control for retinal
... In vision science and biomedical imaging, AO can increase both lateral and axial resolution in confocal fundus imaging [2,4]. The Adaptive Optics Scanning Laser Ophthalmoscope (AOSLO) [4], a confocal Scanning Laser Ophthalmoscope (SLO) equipped with adaptive optics, allows the improved en face imagi ...
... In vision science and biomedical imaging, AO can increase both lateral and axial resolution in confocal fundus imaging [2,4]. The Adaptive Optics Scanning Laser Ophthalmoscope (AOSLO) [4], a confocal Scanning Laser Ophthalmoscope (SLO) equipped with adaptive optics, allows the improved en face imagi ...
Mirrors form images by reflecting light.
... Mirrors, lenses, and other optical inventions are called optical tools. By combining optical tools, inventors have developed powerful instruments to extend human vision. For example, the microscope uses a combination of mirrors and lenses to make very small structures visible. Telescopes combine opt ...
... Mirrors, lenses, and other optical inventions are called optical tools. By combining optical tools, inventors have developed powerful instruments to extend human vision. For example, the microscope uses a combination of mirrors and lenses to make very small structures visible. Telescopes combine opt ...
EPH7052 Optical Comm Chapter05 Amplifiers
... • can be readily integrated along with other semiconductors and photonic devices into one monolithic chip called an optoelectronic integrated circuit (OEIC) ...
... • can be readily integrated along with other semiconductors and photonic devices into one monolithic chip called an optoelectronic integrated circuit (OEIC) ...
Title: Difference in retinal nerve fiber layer thickness between normal
... precede visible atrophy of the optic disc and/or functional loss (Akiyasu K, 2006). However, a clinically detectable change in the optic cup likely represents loss of thousands of axons. Furthermore, testing of visual function, at least with conventional techniques, is a relatively insensitive measu ...
... precede visible atrophy of the optic disc and/or functional loss (Akiyasu K, 2006). However, a clinically detectable change in the optic cup likely represents loss of thousands of axons. Furthermore, testing of visual function, at least with conventional techniques, is a relatively insensitive measu ...
PDF file. - UCL Medical Physics and Biomedical
... coefficient and the fluence, the latter being a function of the spatial distribution of the spectral absorption and scattering characteristics of all the chromophores and scatterers within the illuminated volume. In order to reconstruct the spatial distribution of the absorption coefficient, and hen ...
... coefficient and the fluence, the latter being a function of the spatial distribution of the spectral absorption and scattering characteristics of all the chromophores and scatterers within the illuminated volume. In order to reconstruct the spatial distribution of the absorption coefficient, and hen ...
Chapter 2
... characteristics of light in an optical fiber : Ray-tracing approach; Mode Theory (Maxwell’s equations) ¾ RayRay-tracing approach provides a good approximation to light acceptance acceptance and guiding properties of optical fiber when the ratio of fiber radius to the the wavelength is large, which i ...
... characteristics of light in an optical fiber : Ray-tracing approach; Mode Theory (Maxwell’s equations) ¾ RayRay-tracing approach provides a good approximation to light acceptance acceptance and guiding properties of optical fiber when the ratio of fiber radius to the the wavelength is large, which i ...
He-Ne laser -- Optical Resonator
... HINT: It is helpful to use a small piece of paper to trace the beam as it travels from the He-Ne tube to the adjustable mirror and back to accurately direct the beam back into the cavity. This is also useful for tracing out the beam once lasing is achieved; “laser jocks” frequently carry around a bu ...
... HINT: It is helpful to use a small piece of paper to trace the beam as it travels from the He-Ne tube to the adjustable mirror and back to accurately direct the beam back into the cavity. This is also useful for tracing out the beam once lasing is achieved; “laser jocks” frequently carry around a bu ...
Article
... improved performance [5]. However, practical system implementations, both in commercial and military networks, will require that code-processing devices (e.g., encoders and decoders at the transmitter and receiver end, respectively) be made using robust, lightweight, and low-cost technology platform ...
... improved performance [5]. However, practical system implementations, both in commercial and military networks, will require that code-processing devices (e.g., encoders and decoders at the transmitter and receiver end, respectively) be made using robust, lightweight, and low-cost technology platform ...
... Deng Ning, Chan Kit, Chan Chun-Kit, Chen Lian-Kuan, An all-optical XOR logic gate for high-speed RZ-DPSK signals by FWM in semiconductor optical amplifier, IEEE J. Selected Topics Quant. Electron. 12 (July/August (4)) (2006) 702–707. Wang Jian, Sun Junqiang, Zhang Xinliang, M.M. Dexiu Huang, Fejer, ...
DesignCon 2013 Advances in Onboard Optical Interconnects: A New Generation of Miniature Optical
... Fig. 5. The Luxtera engine shown in Fig. 3 above is also realized using Silicon Photonics technology. Note that both of these pictures can be somewhat misleading: unlike the other VCSEL core engines, the modules are shown incomplete as they are not showing the necessary single-mode fiber optical cou ...
... Fig. 5. The Luxtera engine shown in Fig. 3 above is also realized using Silicon Photonics technology. Note that both of these pictures can be somewhat misleading: unlike the other VCSEL core engines, the modules are shown incomplete as they are not showing the necessary single-mode fiber optical cou ...
Optical modulator utilising InAs Quantum Dots grown on Si
... Si-based photonic devices have attracted considerable attention over recent years due to the potential to have optical components compatible with Si based CMOS circuitry [1], [2]. Recently great progress has been made at growing In(Ga)As quantum dots on Si [3] and Ge [4] substrates, to realize lasin ...
... Si-based photonic devices have attracted considerable attention over recent years due to the potential to have optical components compatible with Si based CMOS circuitry [1], [2]. Recently great progress has been made at growing In(Ga)As quantum dots on Si [3] and Ge [4] substrates, to realize lasin ...
Performance evaluation of the free space optical (FSO)
... proportional to the square of the field’s amplitude. The light fields from laser ...
... proportional to the square of the field’s amplitude. The light fields from laser ...
PDF
... transform lens. Each pixel on the SLM can spatially modulate the local phase of the incident beam in the range of 0 to 2 at the operating wavelength of 1064nm with an effective refresh rate of 10-30 Hz for the entire array. We generated the holograms making use of a user-friendly graphical software ...
... transform lens. Each pixel on the SLM can spatially modulate the local phase of the incident beam in the range of 0 to 2 at the operating wavelength of 1064nm with an effective refresh rate of 10-30 Hz for the entire array. We generated the holograms making use of a user-friendly graphical software ...
WRL0087.tmp
... As seen earlier, has to be real for a propagating mode. The frequency range over which remains real therefore is important information. It can be shown that for to be real the frequency of the wave has to be greater than certain value, called the cut-off frequency. 1. Cutoff frequency is defin ...
... As seen earlier, has to be real for a propagating mode. The frequency range over which remains real therefore is important information. It can be shown that for to be real the frequency of the wave has to be greater than certain value, called the cut-off frequency. 1. Cutoff frequency is defin ...
Optical coherence tomography
Optical coherence tomography (OCT) is an established medical imaging technique that uses light to capture micrometer-resolution, three-dimensional images from within optical scattering media (e.g., biological tissue). Optical coherence tomography is based on low-coherence interferometry, typically employing near-infrared light. The use of relatively long wavelength light allows it to penetrate into the scattering medium. Confocal microscopy, another optical technique, typically penetrates less deeply into the sample but with higher resolution.Depending on the properties of the light source (superluminescent diodes, ultrashort pulsed lasers, and supercontinuum lasers have been employed), optical coherence tomography has achieved sub- micrometer resolution (with very wide-spectrum sources emitting over a ~100 nm wavelength range).Optical coherence tomography is one of a class of optical tomographic techniques. A relatively recent implementation of optical coherence tomography, frequency-domain optical coherence tomography, provides advantages in signal-to-noise ratio, permitting faster signal acquisition. Commercially available optical coherence tomography systems are employed in diverse applications, including art conservation and diagnostic medicine, notably in ophthalmology and optometry where it can be used to obtain detailed images from within the retina. Recently it has also begun to be used in interventional cardiology to help diagnose coronary artery disease. It has also shown promise in dermatology to improve the diagnostic process.